restricted acces to the net fedora6

hello, i'm new to this system and i have a strange problem
i can only reach google domain on the net
with the browser all other adresses give "waiting for response..."
gaim or opera neither manage to connect.
i've an dls router and a switch, the others computer of the lan are ok
(windows xp and linux mandrake)

I've tried static IP, and DNS manually setup, same problem
the ping command works on the lan and on the net!
the firewall is unplugged
IPV6 is off in firefox and fedora
my host file is empty
i cannot even log on my modem interface (192.168.1.1) ("waiting for
response..." again)

here's a traceroute exaple on google and yahoo
the DNS resolution is good but i never reach yahoo.fr
any idea?

-----------------------------------
[root@localhost ~]# traceroute google.fr
traceroute to google.fr (66.102.9.104), 30 hops max, 40 byte packets
1 * * *
2 bas01.mon.as12876.net (212.129.9.73) 28.322 ms 28.825 ms 28.529 ms
3 vlan52.sw4.mon.as12876.net (212.129.14.186) 29.176 ms 28.443 ms
28.453 ms
4 ae1-12.bb3.mon.as12876.net (212.129.23.17) 31.400 ms 30.448 ms
30.925 ms
5 so-4-1-0-0.bb3.mar.as12876.net (212.129.8.249) 33.429 ms 37.665
ms 35.404 ms
6 212.129.8.72 (212.129.8.72) 36.324 ms 33.538 ms 33.024 ms
7 so-4-0-0-0.bb2.cou.as12876.net (212.129.8.69) 53.929 ms 54.044
ms 52.994 ms
8 so-5-0-0.cr1.lhr3.uk.above.net (64.125.23.13) 61.995 ms 62.058
ms so-4-0-0.cr1.lhr3.uk.above.net (64.125.23.9) 60.985 ms
9 64.125.28.38.available.above.net (64.125.28.38) 60.643 ms
so-0-0-0.mpr1.lhr2.uk.above.net (64.125.27.225) 62.035 ms
64.125.28.38.available.above.net (64.125.28.38) 60.968 ms
10 213-152-230-99.google.net (213.152.230.99) 60.034 ms 58.989 ms
59.691 ms
11 72.14.238.242 (72.14.238.242) 78.880 ms 75.104 ms 71.249 ms
12 216.239.49.254 (216.239.49.254) 68.969 ms 68.967 ms 70.985 ms
13 64.233.174.113 (64.233.174.113) 72.992 ms 70.841 ms 68.853 ms
14 72.14.232.239 (72.14.232.239) 69.881 ms 69.868 ms 69.918 ms
15 64.233.174.18 (64.233.174.18) 71.882 ms 72.845 ms 71.886 ms
16 66.102.9.104 (66.102.9.104) 68.855 ms 69.615 ms 69.906 ms
---------------------------------------------------
[root@localhost ~]# traceroute yahoo.fr
traceroute to yahoo.fr (217.146.186.51), 30 hops max, 40 byte packets
1 * * *
2 bas01.mon.as12876.net (212.129.9.73) 28.963 ms 27.832 ms 28.620 ms
3 vlan51.sw3.mon.as12876.net (212.129.14.178) 28.287 ms 29.753 ms
29.675 ms
4 ae0-11.bb3.mon.as12876.net (212.129.23.13) 29.640 ms 29.656 ms
28.852 ms
5 so-4-1-0-0.bb3.mar.as12876.net (212.129.8.249) 32.776 ms 32.627
ms 35.074 ms
6 so-4-0-0-0.bb1.cou.as12876.net (212.129.8.77) 51.639 ms 53.983
ms 51.646 ms
7 so-0-0-0.dub20.ip.tiscali.net (213.200.80.42) 67.917 ms 68.195
ms 68.212 ms
8 yahoo-overture-gw1.dub20.ip.tiscali.net (213.200.67.198) 71.515 ms
72.215 ms 72.185 ms
9 gi-1-1.bas-a1.ird.yahoo.com (217.146.191.129) 71.845 ms 72.196
ms gi-1-1.bas-a2.ird.yahoo.com (217.146.191.131) 72.179 ms
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
[root@localhost ~]#

lolo <(E-Mail Removed)> wrote:
> hello, i'm new to this system and i have a strange problem
> i can only reach google domain on the net
> with the browser all other adresses give "waiting for response..."
> gaim or opera neither manage to connect.
> i've an dls router and a switch, the others computer of the lan are ok
> (windows xp and linux mandrake)

> I've tried static IP, and DNS manually setup, same problem
> the ping command works on the lan and on the net!
> the firewall is unplugged
> IPV6 is off in firefox and fedora
> my host file is empty
> i cannot even log on my modem interface (192.168.1.1) ("waiting for
> response..." again)

Sounds like a PMTU Discovery problem. Try reducing your MTU. Or add
a clamp-to-mss rule - man iptables, search for TCPMSS.

--
Clifford Kite
/* The generation of random numbers is too important to be left
to chance. */

On Wed, 06 Dec 2006, in the Usenet newsgroup comp.os.linux.networking, in
article <el613u$7er$(E-Mail Removed)>, lolo wrote:

>i can only reach google domain on the net
>with the browser all other adresses give "waiting for response..."
>gaim or opera neither manage to connect.
>i've an dls router and a switch, the others computer of the lan are ok
>(windows xp and linux mandrake)

If the Mandrake box can connect, and FC6 can not, a quick test is to use
a packet sniffer on each, and see what is the difference. man tcpdump
or man wireshark (wireshark is the program formally called ethereal.)

>the firewall is unplugged

This makes no sense.

>my host file is empty

You should have (at least) the localhost entry. If using static addresses,
you should also put the full hostname and IP address of "this" system in
the hosts file.

>i cannot even log on my modem interface (192.168.1.1) ("waiting for
>response..." again)

Despite what you say, this sounds like a firewall problem. Run the
command '/sbin/iptables -L' and '/bin/netstat -anptu' to see what is
available locally.

>here's a traceroute exaple on google and yahoo
>the DNS resolution is good but i never reach yahoo.fr
>any idea?

Traceroute has lost much of it's usefulness because of firewall rules
blocking ICMP. I would normally use tcptraceroute

> 9 gi-1-1.bas-a1.ird.yahoo.com (217.146.191.129) 71.845 ms 72.196
>ms gi-1-1.bas-a2.ird.yahoo.com (217.146.191.131) 72.179 ms
>10 * * *

Using tcptraceroute, the next hop is your destination. I'm not getting a
response either to ICMP echos or UDP, so I can't say one way or the
other.

Old guy